Re: locks and high CPU

[Erick Erickson]

Thanks Shalin, I'd forgotten about that one

On Thu, Oct 22, 2015 at 11:22 PM, Shalin Shekhar Mangar
 wrote:
> I think you running into
> https://issues.apache.org/jira/browse/SOLR-6136 where a spin lock in
> ConcurrentUpdateSolrServer blocks with high cpu usage. Try upgrading
> to 4.10.x but for best results, upgrade to 5.x because of all the
> fixes that have been added since and also because no new releases will
> be available for the 4.x branch going forward.
>
> On Fri, Oct 23, 2015 at 5:15 AM, Rallavagu  wrote:
>> Thanks Erick. Currently, migrating to 5.3 and it is taking a bit of time.
>> Meanwhile, I looked at the JIRAs from the blog and the stack trace looks a
>> bit different from what I see but not sure if they are related. Also, as per
>> the stack trace I have included in my original email, it is the tomcat
>> thread that is locking but not the recovery thread which will be responsible
>> writing updates to followers. I agree that we might throttle updates but
>> what is annoying is unable to see issues in controlled load test env.
>>
>> Just to understand better, what is the tomcat thread doing in this case?
>>
>> Thanks
>>
>>
>> On 10/22/15 12:53 PM, Erick Erickson wrote:
>>>
>>> The details are in Tim's blog post and the linked JIRAs
>>>
>>> Unfortunately, the only real solution I know of is to upgrade
>>> to at least Solr 5.2. Meanwhile, throttling the indexing rate
>>> will at least smooth out the issue. Not a great approach but
>>> all there is for 4.6.
>>>
>>> Best,
>>> Erick
>>>
>>> On Thu, Oct 22, 2015 at 10:48 AM, Rallavagu Kon 
>>> wrote:

 Erick,

 Indexing happening via Solr cloud server. This thread was from the
 leader. Some followers show symptom of high cpu during this time. You think
 this is from locking? What is the thread that is holding the lock doing?
 Also, we are unable to reproduce this issue in load test environment. Any
 clues would help.

> On Oct 22, 2015, at 09:50, Erick Erickson 
> wrote:
>
> Prior to Solr 5.2, there were several inefficiencies when distributing
> updates to replicas, see:
>
> https://lucidworks.com/blog/2015/06/10/indexing-performance-solr-5-2-now-twice-fast/.
>
> The symptom was that there was significantly higher CPU utilization on
> the followers
> compared to the leader.
>
> The only real fix is to upgrade to 5.2+ assuming that's your issue.
>
> How are you indexing? Using SolrJ with CloudSolrServer would help if
> you're not using
> them.
>
> Best,
> Erick
>
>> On Thu, Oct 22, 2015 at 9:43 AM, Rallavagu  wrote:
>> Solr 4.6.1 cloud
>>
>> Looking into thread dump 4-5 threads causing cpu to go very high and
>> causing
>> issues. These are tomcat's http threads and are locking. Can anybody
>> help me
>> understand what is going on here? I see that incoming connections
>> coming in
>> for updates and they are being passed on to StreamingSolrServer and
>> subsequently ConcurrentUpdateSolrServer and they both have locks.
>> Thanks.
>>
>>
>> "http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive,
>> native_blocked, daemon
>> at __lll_lock_wait+34(:0)@0x38caa0e262
>> at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
>> at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
>> at _L_unlock_16+44(:0)@0x38caa0f710
>> at
>>
>> java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
>> at
>>
>> org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
>> at
>>
>> org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
>> at
>>
>> org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
>> at
>>
>> org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
>> at
>>
>> org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
>> ^-- Holding lock:
>> org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
>> ^-- Holding lock:
>> org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
>> at
>>
>> org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
>> at
>>
>> org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]
>> at
>> org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
>> at
>>
>> 

Re: locks and high CPU

[Shalin Shekhar Mangar]

I think you running into
https://issues.apache.org/jira/browse/SOLR-6136 where a spin lock in
ConcurrentUpdateSolrServer blocks with high cpu usage. Try upgrading
to 4.10.x but for best results, upgrade to 5.x because of all the
fixes that have been added since and also because no new releases will
be available for the 4.x branch going forward.

On Fri, Oct 23, 2015 at 5:15 AM, Rallavagu  wrote:
> Thanks Erick. Currently, migrating to 5.3 and it is taking a bit of time.
> Meanwhile, I looked at the JIRAs from the blog and the stack trace looks a
> bit different from what I see but not sure if they are related. Also, as per
> the stack trace I have included in my original email, it is the tomcat
> thread that is locking but not the recovery thread which will be responsible
> writing updates to followers. I agree that we might throttle updates but
> what is annoying is unable to see issues in controlled load test env.
>
> Just to understand better, what is the tomcat thread doing in this case?
>
> Thanks
>
>
> On 10/22/15 12:53 PM, Erick Erickson wrote:
>>
>> The details are in Tim's blog post and the linked JIRAs
>>
>> Unfortunately, the only real solution I know of is to upgrade
>> to at least Solr 5.2. Meanwhile, throttling the indexing rate
>> will at least smooth out the issue. Not a great approach but
>> all there is for 4.6.
>>
>> Best,
>> Erick
>>
>> On Thu, Oct 22, 2015 at 10:48 AM, Rallavagu Kon 
>> wrote:
>>>
>>> Erick,
>>>
>>> Indexing happening via Solr cloud server. This thread was from the
>>> leader. Some followers show symptom of high cpu during this time. You think
>>> this is from locking? What is the thread that is holding the lock doing?
>>> Also, we are unable to reproduce this issue in load test environment. Any
>>> clues would help.
>>>
 On Oct 22, 2015, at 09:50, Erick Erickson 
 wrote:

 Prior to Solr 5.2, there were several inefficiencies when distributing
 updates to replicas, see:

 https://lucidworks.com/blog/2015/06/10/indexing-performance-solr-5-2-now-twice-fast/.

 The symptom was that there was significantly higher CPU utilization on
 the followers
 compared to the leader.

 The only real fix is to upgrade to 5.2+ assuming that's your issue.

 How are you indexing? Using SolrJ with CloudSolrServer would help if
 you're not using
 them.

 Best,
 Erick

> On Thu, Oct 22, 2015 at 9:43 AM, Rallavagu  wrote:
> Solr 4.6.1 cloud
>
> Looking into thread dump 4-5 threads causing cpu to go very high and
> causing
> issues. These are tomcat's http threads and are locking. Can anybody
> help me
> understand what is going on here? I see that incoming connections
> coming in
> for updates and they are being passed on to StreamingSolrServer and
> subsequently ConcurrentUpdateSolrServer and they both have locks.
> Thanks.
>
>
> "http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive,
> native_blocked, daemon
> at __lll_lock_wait+34(:0)@0x38caa0e262
> at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
> at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
> at _L_unlock_16+44(:0)@0x38caa0f710
> at
>
> java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
> at
>
> org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
> at
>
> org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
> at
>
> org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
> at
>
> org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
> at
>
> org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
> ^-- Holding lock:
> org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
> ^-- Holding lock:
> org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
> at
>
> org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
> at
>
> org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]
> at
> org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
> at
>
> org/apache/solr/servlet/SolrDispatchFilter.execute(SolrDispatchFilter.java:721)[inlined]
> at
>
> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:417)[inlined]
> at
>
> 

Re: locks and high CPU

[Rallavagu Kon]

Erick,

Indexing happening via Solr cloud server. This thread was from the leader. Some 
followers show symptom of high cpu during this time. You think this is from 
locking? What is the thread that is holding the lock doing? Also, we are unable 
to reproduce this issue in load test environment. Any clues would help.

> On Oct 22, 2015, at 09:50, Erick Erickson  wrote:
> 
> Prior to Solr 5.2, there were several inefficiencies when distributing
> updates to replicas, see:
> https://lucidworks.com/blog/2015/06/10/indexing-performance-solr-5-2-now-twice-fast/.
> 
> The symptom was that there was significantly higher CPU utilization on
> the followers
> compared to the leader.
> 
> The only real fix is to upgrade to 5.2+ assuming that's your issue.
> 
> How are you indexing? Using SolrJ with CloudSolrServer would help if
> you're not using
> them.
> 
> Best,
> Erick
> 
>> On Thu, Oct 22, 2015 at 9:43 AM, Rallavagu  wrote:
>> Solr 4.6.1 cloud
>> 
>> Looking into thread dump 4-5 threads causing cpu to go very high and causing
>> issues. These are tomcat's http threads and are locking. Can anybody help me
>> understand what is going on here? I see that incoming connections coming in
>> for updates and they are being passed on to StreamingSolrServer and
>> subsequently ConcurrentUpdateSolrServer and they both have locks. Thanks.
>> 
>> 
>> "http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive,
>> native_blocked, daemon
>>at __lll_lock_wait+34(:0)@0x38caa0e262
>>at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
>>at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
>>at _L_unlock_16+44(:0)@0x38caa0f710
>>at
>> java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
>>at
>> org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
>>at
>> org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
>>at
>> org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
>>at
>> org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
>>at
>> org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
>>^-- Holding lock:
>> org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
>>^-- Holding lock:
>> org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
>>at
>> org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
>>at
>> org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]
>>at org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
>>at
>> org/apache/solr/servlet/SolrDispatchFilter.execute(SolrDispatchFilter.java:721)[inlined]
>>at
>> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:417)[inlined]
>>at
>> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)[optimized]
>>at
>> org/apache/catalina/core/ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)[inlined]
>>at
>> org/apache/catalina/core/ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)[optimized]
>>at
>> org/apache/catalina/core/StandardWrapperValve.invoke(StandardWrapperValve.java:222)[optimized]
>>at
>> org/apache/catalina/core/StandardContextValve.invoke(StandardContextValve.java:123)[optimized]
>>at
>> org/apache/catalina/core/StandardHostValve.invoke(StandardHostValve.java:171)[optimized]
>>at
>> org/apache/catalina/valves/ErrorReportValve.invoke(ErrorReportValve.java:99)[optimized]
>>at
>> org/apache/catalina/valves/AccessLogValve.invoke(AccessLogValve.java:953)[optimized]
>>at
>> org/apache/catalina/core/StandardEngineValve.invoke(StandardEngineValve.java:118)[optimized]
>>at
>> org/apache/catalina/connector/CoyoteAdapter.service(CoyoteAdapter.java:408)[optimized]
>>at
>> org/apache/coyote/http11/AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)[optimized]
>>at
>> org/apache/coyote/AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)[optimized]
>>at
>> org/apache/tomcat/util/net/JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)[optimized]
>>^-- Holding lock:
>> org/apache/tomcat/util/net/SocketWrapper@0x496e58810[thin lock]
>>at
>> java/util/concurrent/ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)[inlined]
>>at
>> java/util/concurrent/ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)[optimized]
>>at java/lang/Thread.run(Thread.java:682)[optimized]
>>at jrockit/vm/RNI.c2java(J)V(Native Method)

Re: locks and high CPU

[Erick Erickson]

The details are in Tim's blog post and the linked JIRAs

Unfortunately, the only real solution I know of is to upgrade
to at least Solr 5.2. Meanwhile, throttling the indexing rate
will at least smooth out the issue. Not a great approach but
all there is for 4.6.

Best,
Erick

On Thu, Oct 22, 2015 at 10:48 AM, Rallavagu Kon  wrote:
> Erick,
>
> Indexing happening via Solr cloud server. This thread was from the leader. 
> Some followers show symptom of high cpu during this time. You think this is 
> from locking? What is the thread that is holding the lock doing? Also, we are 
> unable to reproduce this issue in load test environment. Any clues would help.
>
>> On Oct 22, 2015, at 09:50, Erick Erickson  wrote:
>>
>> Prior to Solr 5.2, there were several inefficiencies when distributing
>> updates to replicas, see:
>> https://lucidworks.com/blog/2015/06/10/indexing-performance-solr-5-2-now-twice-fast/.
>>
>> The symptom was that there was significantly higher CPU utilization on
>> the followers
>> compared to the leader.
>>
>> The only real fix is to upgrade to 5.2+ assuming that's your issue.
>>
>> How are you indexing? Using SolrJ with CloudSolrServer would help if
>> you're not using
>> them.
>>
>> Best,
>> Erick
>>
>>> On Thu, Oct 22, 2015 at 9:43 AM, Rallavagu  wrote:
>>> Solr 4.6.1 cloud
>>>
>>> Looking into thread dump 4-5 threads causing cpu to go very high and causing
>>> issues. These are tomcat's http threads and are locking. Can anybody help me
>>> understand what is going on here? I see that incoming connections coming in
>>> for updates and they are being passed on to StreamingSolrServer and
>>> subsequently ConcurrentUpdateSolrServer and they both have locks. Thanks.
>>>
>>>
>>> "http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive,
>>> native_blocked, daemon
>>>at __lll_lock_wait+34(:0)@0x38caa0e262
>>>at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
>>>at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
>>>at _L_unlock_16+44(:0)@0x38caa0f710
>>>at
>>> java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
>>>at
>>> org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
>>>at
>>> org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
>>>at
>>> org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
>>>at
>>> org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
>>>at
>>> org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
>>>^-- Holding lock:
>>> org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
>>>^-- Holding lock:
>>> org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
>>>at
>>> org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
>>>at
>>> org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]
>>>at org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
>>>at
>>> org/apache/solr/servlet/SolrDispatchFilter.execute(SolrDispatchFilter.java:721)[inlined]
>>>at
>>> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:417)[inlined]
>>>at
>>> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)[optimized]
>>>at
>>> org/apache/catalina/core/ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)[inlined]
>>>at
>>> org/apache/catalina/core/ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)[optimized]
>>>at
>>> org/apache/catalina/core/StandardWrapperValve.invoke(StandardWrapperValve.java:222)[optimized]
>>>at
>>> org/apache/catalina/core/StandardContextValve.invoke(StandardContextValve.java:123)[optimized]
>>>at
>>> org/apache/catalina/core/StandardHostValve.invoke(StandardHostValve.java:171)[optimized]
>>>at
>>> org/apache/catalina/valves/ErrorReportValve.invoke(ErrorReportValve.java:99)[optimized]
>>>at
>>> org/apache/catalina/valves/AccessLogValve.invoke(AccessLogValve.java:953)[optimized]
>>>at
>>> org/apache/catalina/core/StandardEngineValve.invoke(StandardEngineValve.java:118)[optimized]
>>>at
>>> org/apache/catalina/connector/CoyoteAdapter.service(CoyoteAdapter.java:408)[optimized]
>>>at
>>> org/apache/coyote/http11/AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)[optimized]
>>>at
>>> org/apache/coyote/AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)[optimized]
>>>at
>>> org/apache/tomcat/util/net/JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)[optimized]
>>>^-- Holding lock:
>>> 

Re: locks and high CPU

[Rallavagu]

Thanks Erick. Currently, migrating to 5.3 and it is taking a bit of 
time. Meanwhile, I looked at the JIRAs from the blog and the stack trace 
looks a bit different from what I see but not sure if they are related. 
Also, as per the stack trace I have included in my original email, it is 
the tomcat thread that is locking but not the recovery thread which will 
be responsible writing updates to followers. I agree that we might 
throttle updates but what is annoying is unable to see issues in 
controlled load test env.


Just to understand better, what is the tomcat thread doing in this case?

Thanks

On 10/22/15 12:53 PM, Erick Erickson wrote:

The details are in Tim's blog post and the linked JIRAs

Unfortunately, the only real solution I know of is to upgrade
to at least Solr 5.2. Meanwhile, throttling the indexing rate
will at least smooth out the issue. Not a great approach but
all there is for 4.6.

Best,
Erick

On Thu, Oct 22, 2015 at 10:48 AM, Rallavagu Kon  wrote:

Erick,

Indexing happening via Solr cloud server. This thread was from the leader. Some 
followers show symptom of high cpu during this time. You think this is from 
locking? What is the thread that is holding the lock doing? Also, we are unable 
to reproduce this issue in load test environment. Any clues would help.


On Oct 22, 2015, at 09:50, Erick Erickson  wrote:

Prior to Solr 5.2, there were several inefficiencies when distributing
updates to replicas, see:
https://lucidworks.com/blog/2015/06/10/indexing-performance-solr-5-2-now-twice-fast/.

The symptom was that there was significantly higher CPU utilization on
the followers
compared to the leader.

The only real fix is to upgrade to 5.2+ assuming that's your issue.

How are you indexing? Using SolrJ with CloudSolrServer would help if
you're not using
them.

Best,
Erick


On Thu, Oct 22, 2015 at 9:43 AM, Rallavagu  wrote:
Solr 4.6.1 cloud

Looking into thread dump 4-5 threads causing cpu to go very high and causing
issues. These are tomcat's http threads and are locking. Can anybody help me
understand what is going on here? I see that incoming connections coming in
for updates and they are being passed on to StreamingSolrServer and
subsequently ConcurrentUpdateSolrServer and they both have locks. Thanks.


"http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive,
native_blocked, daemon
at __lll_lock_wait+34(:0)@0x38caa0e262
at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
at _L_unlock_16+44(:0)@0x38caa0f710
at
java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
at
org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
at
org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
at
org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
at
org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
at
org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
^-- Holding lock:
org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
^-- Holding lock:
org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
at
org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
at
org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]
at org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
at
org/apache/solr/servlet/SolrDispatchFilter.execute(SolrDispatchFilter.java:721)[inlined]
at
org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:417)[inlined]
at
org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)[optimized]
at
org/apache/catalina/core/ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)[inlined]
at
org/apache/catalina/core/ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)[optimized]
at
org/apache/catalina/core/StandardWrapperValve.invoke(StandardWrapperValve.java:222)[optimized]
at
org/apache/catalina/core/StandardContextValve.invoke(StandardContextValve.java:123)[optimized]
at
org/apache/catalina/core/StandardHostValve.invoke(StandardHostValve.java:171)[optimized]
at
org/apache/catalina/valves/ErrorReportValve.invoke(ErrorReportValve.java:99)[optimized]
at
org/apache/catalina/valves/AccessLogValve.invoke(AccessLogValve.java:953)[optimized]
at
org/apache/catalina/core/StandardEngineValve.invoke(StandardEngineValve.java:118)[optimized]
at
org/apache/catalina/connector/CoyoteAdapter.service(CoyoteAdapter.java:408)[optimized]
at

locks and high CPU

[Rallavagu]

Solr 4.6.1 cloud

Looking into thread dump 4-5 threads causing cpu to go very high and 
causing issues. These are tomcat's http threads and are locking. Can 
anybody help me understand what is going on here? I see that incoming 
connections coming in for updates and they are being passed on to 
StreamingSolrServer and subsequently ConcurrentUpdateSolrServer and they 
both have locks. Thanks.



"http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive, 
native_blocked, daemon

at __lll_lock_wait+34(:0)@0x38caa0e262
at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
at _L_unlock_16+44(:0)@0x38caa0f710
at 
java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
at 
org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
at 
org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
at 
org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
at 
org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
at 
org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
^-- Holding lock: 
org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
^-- Holding lock: 
org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
at 
org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
at 
org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]

at org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
at 
org/apache/solr/servlet/SolrDispatchFilter.execute(SolrDispatchFilter.java:721)[inlined]
at 
org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:417)[inlined]
at 
org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)[optimized]
at 
org/apache/catalina/core/ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)[inlined]
at 
org/apache/catalina/core/ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)[optimized]
at 
org/apache/catalina/core/StandardWrapperValve.invoke(StandardWrapperValve.java:222)[optimized]
at 
org/apache/catalina/core/StandardContextValve.invoke(StandardContextValve.java:123)[optimized]
at 
org/apache/catalina/core/StandardHostValve.invoke(StandardHostValve.java:171)[optimized]
at 
org/apache/catalina/valves/ErrorReportValve.invoke(ErrorReportValve.java:99)[optimized]
at 
org/apache/catalina/valves/AccessLogValve.invoke(AccessLogValve.java:953)[optimized]
at 
org/apache/catalina/core/StandardEngineValve.invoke(StandardEngineValve.java:118)[optimized]
at 
org/apache/catalina/connector/CoyoteAdapter.service(CoyoteAdapter.java:408)[optimized]
at 
org/apache/coyote/http11/AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)[optimized]
at 
org/apache/coyote/AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)[optimized]
at 
org/apache/tomcat/util/net/JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)[optimized]
^-- Holding lock: 
org/apache/tomcat/util/net/SocketWrapper@0x496e58810[thin lock]
at 
java/util/concurrent/ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)[inlined]
at 
java/util/concurrent/ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)[optimized]

at java/lang/Thread.run(Thread.java:682)[optimized]
at jrockit/vm/RNI.c2java(J)V(Native Method)

Re: locks and high CPU

[Erick Erickson]

Prior to Solr 5.2, there were several inefficiencies when distributing
updates to replicas, see:
https://lucidworks.com/blog/2015/06/10/indexing-performance-solr-5-2-now-twice-fast/.

The symptom was that there was significantly higher CPU utilization on
the followers
compared to the leader.

The only real fix is to upgrade to 5.2+ assuming that's your issue.

How are you indexing? Using SolrJ with CloudSolrServer would help if
you're not using
them.

Best,
Erick

On Thu, Oct 22, 2015 at 9:43 AM, Rallavagu  wrote:
> Solr 4.6.1 cloud
>
> Looking into thread dump 4-5 threads causing cpu to go very high and causing
> issues. These are tomcat's http threads and are locking. Can anybody help me
> understand what is going on here? I see that incoming connections coming in
> for updates and they are being passed on to StreamingSolrServer and
> subsequently ConcurrentUpdateSolrServer and they both have locks. Thanks.
>
>
> "http-bio-8080-exec-4394" id=8774 idx=0x988 tid=14548 prio=5 alive,
> native_blocked, daemon
> at __lll_lock_wait+34(:0)@0x38caa0e262
> at safepointSyncOnPollAccess+167(safepoint.c:83)@0x7fc29b9c9138
> at trapiNormalHandler+484(traps_posix.c:220)@0x7fc29b9fd745
> at _L_unlock_16+44(:0)@0x38caa0f710
> at
> java/util/concurrent/locks/ReentrantLock.lock(ReentrantLock.java:262)[optimized]
> at
> org/apache/solr/client/solrj/impl/ConcurrentUpdateSolrServer.blockUntilFinished(ConcurrentUpdateSolrServer.java:391)[inlined]
> at
> org/apache/solr/update/StreamingSolrServers.blockUntilFinished(StreamingSolrServers.java:98)[inlined]
> at
> org/apache/solr/update/SolrCmdDistributor.finish(SolrCmdDistributor.java:61)[inlined]
> at
> org/apache/solr/update/processor/DistributedUpdateProcessor.doFinish(DistributedUpdateProcessor.java:501)[inlined]
> at
> org/apache/solr/update/processor/DistributedUpdateProcessor.finish(DistributedUpdateProcessor.java:1278)[optimized]
> ^-- Holding lock:
> org/apache/solr/update/StreamingSolrServers$1@0x496cf6e50[biased lock]
> ^-- Holding lock:
> org/apache/solr/update/StreamingSolrServers@0x49d32adc8[biased lock]
> at
> org/apache/solr/handler/ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:83)[optimized]
> at
> org/apache/solr/handler/RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)[optimized]
> at org/apache/solr/core/SolrCore.execute(SolrCore.java:1859)[optimized]
> at
> org/apache/solr/servlet/SolrDispatchFilter.execute(SolrDispatchFilter.java:721)[inlined]
> at
> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:417)[inlined]
> at
> org/apache/solr/servlet/SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)[optimized]
> at
> org/apache/catalina/core/ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)[inlined]
> at
> org/apache/catalina/core/ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)[optimized]
> at
> org/apache/catalina/core/StandardWrapperValve.invoke(StandardWrapperValve.java:222)[optimized]
> at
> org/apache/catalina/core/StandardContextValve.invoke(StandardContextValve.java:123)[optimized]
> at
> org/apache/catalina/core/StandardHostValve.invoke(StandardHostValve.java:171)[optimized]
> at
> org/apache/catalina/valves/ErrorReportValve.invoke(ErrorReportValve.java:99)[optimized]
> at
> org/apache/catalina/valves/AccessLogValve.invoke(AccessLogValve.java:953)[optimized]
> at
> org/apache/catalina/core/StandardEngineValve.invoke(StandardEngineValve.java:118)[optimized]
> at
> org/apache/catalina/connector/CoyoteAdapter.service(CoyoteAdapter.java:408)[optimized]
> at
> org/apache/coyote/http11/AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)[optimized]
> at
> org/apache/coyote/AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)[optimized]
> at
> org/apache/tomcat/util/net/JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)[optimized]
> ^-- Holding lock:
> org/apache/tomcat/util/net/SocketWrapper@0x496e58810[thin lock]
> at
> java/util/concurrent/ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)[inlined]
> at
> java/util/concurrent/ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)[optimized]
> at java/lang/Thread.run(Thread.java:682)[optimized]
> at jrockit/vm/RNI.c2java(J)V(Native Method)